Portion of a shoe upper



FIG. 1 is a front perspective view of a portion of a shoe upper showing my new design;

FIG. 2 is a right side view thereof; and,

FIG. 3 is a front view thereof.

The uneven broken line immediately adjacent to the shaded area represents an unclaimed portion of the boundary of the design. The uneven broken line showing of the two rectangles and the remainder of the shoe form no part of the claimed design. 

The ornamental design for a portion of a shoe upper, as shown and described. 